I completely get what everyone's saying and appreciate the input around the legalities of the Amazon "pepper" spray. Like people have said, there's no way of knowing what you'd do in any given situation, and in reality I'd probably just angrily/sullenly let the buggers get away without putting myself at too much risk.
In general these e-scramblers are a dirge in the wrong hands since they're so mobile and that the police can't really do too much about them.